Pierre drooter



UNITED STATES ATENT OFFICE. T

' PIERRE nnomnn, OF PARIS, FRANCE.

PROCESS OF MAKING B RONZE ALLOYS.

SPECIFICATION forming part of LettersPatent No. 267,742, dated November 21, 1882.

Application filed April 16, 1881. (Specimens) Patented in France December 5, 1878, No.127,801.

To all whom it may concern Be it known that I, PIERRE DRONIER, of the city of Paris, and Republic of France, have invented a new and useful Improvement in the Process of Making Bronze Alloys, of which .the following is a specification.

This invention has for its object the formation of malleable compounds of bronze alloys of copper and tin.

In carrying out my invention I employ an intermediate or uniting body. This substance is mercury. I have discovered that mercury introduced in very small quantities in any of the alloys to which I have referred so changes the conditionsofthese bodies as to render them malleable like copper and similar substances.

" The no ortion of mercur used ma be varied according to the different proportions of the alloys. It may be varied from one-half per cent. to two per cent. I have discovered the fact that it is not absolutely necessary that the mercury form part of the new alloys. Its oflice seems to be catalytic, or more mechanical than chemical. I am of the opinion that this very subtile body, while it passes into the con dition of vapor ata relatively low temperature, being expanded in the body of the alloy compounds opens the pores of the metallic compounds and thereby favors the penetration of the tin into the copper-in a word, occasions a more intimate mingling between the two metals-perhaps a complete mingling.

In effecting the amalgamation of the bronze alloy I have obtained very good results by mingling the mercury with molten tin in the proportion of one per cent. or two per cent. and adding this mixture to the molten copper. The mercury thus introduced during the process of mixing the molten metals is to a great extent lost, so that the subsequent analysis of the alloy does not show this substance as one of the constituents thereof. Whichever way the, mercury is used the bronze formed with the added mercury will be found to be entirely malleable. It is possible to wire-draw it, roll it, stamp it, and strike it up, and indeed to work i-tin the same manner as malleable metals. This bronze is harder, more elastic, and more sonorous than the kinds previously made. It is also admirably adapted to the making of musical instruments, and will also be readily employed in the making of apparatus for su gar factories, refineries, and many other industrial operations.

Indeed it may be said that the new metal may replace copper in many this end and securing a product having the A desired qualities, yet without retaining the mercury as one of the ingredients of the alloy.

What I claim as myinvention, and desire to,

secure by Letters Patent, is-

The within-described process of producing a malleable bronze, the same consisting in mixing mercury with the, metals while the same are-in a molten state at a temperature to distill the mercury as or after the mixture is effected, whereby a malleable alloy is formed of copper andtin substantially freefrom mercury, as set forth.

PIERRE DRON I ER.

Witnesses A. BEQUET, Mon. SAUSSERE. 

